Platen for type-writing machines.



R. W. WOLFF.

PLATBN FOR TYPE WRITING MACHINES.

APPLICATION FILED 00T. 2, 1909.

Patented July 19, 1910.

119 ifneaaea UNITED STATES -Rosnar W. woLrr, or soU'rH ERLANGER, KENTUCKY. 4l

PLATEN ron TYPE-'WRITING MAcH1NE's f Specification of Lettersla'tnt. i `App1icatio1i filed October 2, 1909. Serial No.

Patented 19, ,i i

provided `with `inwardly/v.ex-tending.'"' L To all whom 'it may concern: disks Be it known that I, ROBERT W. W'oLFF, a bosses c d which are snugly received in` an.- 1 citiken of the United States, residing at nularrecesses b biiin tlieoiiter facesof the South Erlanger', in the county of Kenton end-supporting members. he inner endsl c and State ofKentucky,l yhaveinvented cerof the bosses c d are preferably spaced from 'i tain new and useful Improvements in the bottomsof 4the recesses b o. by the j;.' Platens for VType-Writing Machines, `of `spaces o2 b2. Thebearingdisksam secured,` L which the following is a specification. to the end-supporting members,` by means of y invention re ates to platens for typescrews E `passing through apertures c :03"65' Writing machines, and has for its object the in the disks and screwed into the, end-sup- .f provision of a platen or cylinder of the porting members, the screws preferablyexcharacter mentioned so constructed and artendin arallel to the axis of the platen. f A ranged that the noise incident to the strik- Oneo 't e bearing-disks mayhave suitable ing .impact of the type maybe reduced or ratchet-teeth Z2 thereon for being-engaged 70` avoided, and 'the in ention consists in the by the usual paw of the typewriting maparts and in the construction, arrangement c' ine. I i and combination of parts hereinafter de- The bearing-pieces have bearinvs; da V scribed and claimed. thereon which snugly receive a sha F, the i In the drawings: Figure is a side elevashaft passing through central` axial. aper.` tion of my improved device, partly broken tures b? b3 in the end-supporting members, f f2 away, and partly in longitudinal axial secthese axial apertures being ipreferabl of tion. ig. 2 is a cross-section of the saine greater diameter-than the diameter o thel on 'the line 2*@ of Fig. l. Fig. 3 is a crossshaft, and a shellA A being `hollowgfso that` f section of the same on the line y-y of Fig. the sole support of theplaten Yupon'the/shaftV 80 1 l. Fig. 4 is an outside end elevation 'of'one ina be 'received by the bearing-pieces C 'D. v V of the end-supporting members. Fig. 5 isl (lr-is an outer covering, preferablyof rean axial section of the same. 6 is an slient material. such as rubber,which prefinside end elevation of the same.` Fig..7 is erably has an inner lining H of fabric. .an inside end elevation of one of the bearf 'Ihis covering is preferably rof cylindrical 85 ing-pieces; and, Fig. 8 is an inside eid elevaforin and is received over theanniilar flanges Y tion of the other bearing-piece.' o* b4 of the end-supporting members atthe represents a shell which is` referablyof respective ends thereof so as to leave 'an hard Substance, being prefeia ly made of `annular space I between the shell and said x metal,` .for instance steel tubing or aluminum, covering. Pins g may be driven through the and imperforate. l outer covering and lining into the annular B B are end-supporting members, the flanges for aidingin holding thesame against inner ends of which support the shell and relative displacemen A sound-deadening the outer ends of which are supported on substance is received in said annularA space the outer bearing-pieces C D, the inner ends and is indicated at I This substance may of 'the end-supporting members preferably be any substance suitable for the purpose. having centering `parts thereon for centering y. t may for instance consist of a composition the shell with relation thereto, and the outer `o `one part gelatin, two parts glycerin, ends of the end-supporting members having and one-fourth part glucose, L The sound- 1 centering parts thereon for being centered deadeniiig substance, composition or filling-"; n on the beai'ingi-pieces.` The lend-supporting is preferably inserted by pouring the same i members are shown in the forni of lialfinto said `annular space between the shell`-` spools and are preferably made of Iwood or and outer covering while in. .plastic state,l 1 other fibrous material. preferably whilebut one of the end-su` port-` The' support between the shell and the ing members is in place, the other en -sup-@195-f end-supporting members is preferably proporting member'beiiig inserted inplace after i vided by forming the end-supporting menithe filling of 'said space, .the -setting of said bers with central bosses b b snugly received substance securely binding the parts toin-the bore of the shell. The support begether, the fabric lining IH, shown asl atween the bearing-pieces and the endsupsingle layer of textile fabricbeing inter- 110,

posed between the fill' g and y the .outer porting members is preferably formed by, t

covering, and forming ,a binding member forming saidbearingpieces in the form of' PATENT and forms a substantially noiseless backing to the bearing-pieces,

passes unobstructedly the middle of the parts mentioned so that for the outer covering so as to receive the impact of the blows of the type with substantially no or but slight attendant noise.

The shaft may be journaled suitable beare ings L ofa typewriting machine and be provided with turning-knobs M, and the laten secured to the shaft by a set-screw fp My improved construction is such that the parts areireadily assembled and it forms a platen in which the noise incident to the impact of the type is minimized. The outer covering is preferabl vreceived about the periphery of the annu ar' flanges of the endsupprting members, the shell and end-supporting members having ortions which extend into each others ra ial planes for centrallyiy disposing and supporting the upon the end-supporting members, and the bearing-pieces l'and end-supporting members have parts thereon )which .extend into each others radial planes for supporting the endsupporting members centrally with relation so that allthe parts supported centrally-with orting shaft which ongitudinally through are arranged and relation to the sup the cylinder may be placed upon. the shafts evi `various makes of typewriters and substituted fpr the cylinders which may be therein.

The construction further permits the platen to be-turned by a turning-knob at the end y .of the shaft', makin the arts self-contained i and readily inserti the '.iypewriting machine.

le and -removable from My improved construction further permits bearing-pieces of various kinds to be secured to the endsupporting members so as .to support the platen in'various kinds of typewriting ma- It will be further noted that these bearing-pieces and the shaft' are removable without affecting the integrity of the platen.

Having thus fully described my invention,

what I claim as new and desire to secure by a shell supported. between said end-support a sound- Letters Patent is@ 1. In a platen fortypewriting machines, the combination of end-supporting members,

Aashell centrally supported between said endan outer covering, al

lbetween said shell supporting members, sound-deadening filling and covering, and bearlng-pices removably secured to said end-supportlng members.

2.7111 a platen for typewriting machines, the combinationof end-supporting members,

ing members, 'an' outer coverin deadenlng llingbetween sai outer covering, a shaft, and bearing-pieces removably secured members and having bearings thereon'snugly tting said shaft, said end-supporting members and shellhavi-ng bores o greater diamshell supporting members an,

to said end -supportmg Witnesses:

eters than the diameter of said shaft, for the purpose described.

" B. In a platen for typewriting machines, the combination of a shell, an end-support ing member for the end of said shell, and a bearing-piece for said end-supporting memb'er, said bearing-piece and endsupporting member having a recess and boss between them located in each others radial planes for centrally supporting said end-supportin member from said bearing-piece, and

said end-supporting member and shell havboss between them located ing a recess and in each others radial planes for centrally supporting said shell from said'end-supporting member, an outer covering receive about said shell, therel being an annular space between said outer correr-ing and said shell, and a sound-deadening substance in said space, substantially as described.

4. In a platen or typewrit-ingv machines, the combination of an inner shell, end-supporting 'members at the respective ends ofv said shell, bearing-pieces having-bosses for said end-supporting members, portinmembers having inwardly extending osses it their inner faces ,and inwardly extending recesses at their outer faces, the respective ends of said'shell-vreeeived about said inwardly extending bosses on said endsaid recesses receiving said bosses on sai bearing-pieces, an outer covering received about said shell, there being an annular space between said outer covering and'shell, and a sound-deadening said end-supy substance received in said space, substan-v tially as described.

5. In a platen for typewriting machines,

the combination of an inner shell, endsupporting.v members at the respective ends of said shell, bearing-pieces having bosses for said end-supporting members, said end- 'supporting members having inwardly extending bosses at their inner faces and Ainwardly extending recesses at `their outer lfaces for forming undercut radial flanges,

the respective ends of said shell received about said inwardly' extending bosses on said end-supporting members and said recesses receiving said bosses on said bearing-pieces, the said recesses -being deeper than the length of said last-named bosses, anouter covering received about said flanges, there being Aa space between said .flanges and said outer .covering and shell, anda sound-deadening subst 'nce recelved in said space, forlthe purpose described. In testimony whereof, I have signed my ing witnesses. y

Prosser w. woLFF.

4name hereto in the presence of two subscrib- I 

